Following previous works [1]}, [2]}, we use the mean of class-wise intersection (mIoU) over union on unseen classes and harmonic mean IoU (hIoU) among the seen classes and unseen classes as our major metric. The harmonic mean IoU is defined as:
\(\small hIoU=\frac{2*{mIoU}_{seen}*{mIoU}_{unseen}}{{mIoU}_{seen}+{mIoU}_{unseen}}.\) 
